Tool attachment device



Oct. 11, 1932. E. A. ARP

TOOL ATTACHMENT DEVICE Filed Qct. 15, 1930 4 Sheets-Sheet 1 M mi Oct. 11, 1932. E. A: AR.P

TOOL ATTACHMENT DEVICE Filed Oct. 15, 1930 Fig. 5

4 Sheets-Sheet 2 INVENTOR Oct. 11, 1932. E. A. ARP 1,881,993

TOOL ATTACHMENT DEVICE Filed Oct. 15'. 1950 4 Sheets-Sheet 5 mag MN T

'Oct. 11, 1932. E. A. ARP 1,881,993

TOOL ATTACHMENT DEVICE Filed Oct. 15, 1930 4 Sheets-Sheet 4 INVENTOB Patented Oct. 11, 1932 UNITED STATES PATENT orrlcr EWALD Anni or MINNEAPOLIS, MINNESOTA, ASSIGNOR To vnN nonM n monrnn- I TooL COMPANY, onsrRINGrrELn, MASSACHUSETTS, a CORPORATION Toot ATTAcnMnnT nnvrcn Application filed Ootober15,11 930. Serial 7No. ;89;0O4.

This invention :1 designate ;a :tool attachment device. It relates to the art of attaching portable cutting or finishing tools having a .rotaryqmotion, or the motors, centering devices, OI OtllGlhiflPPllltGIlfi-HCGS of such toolsitoithe machine part on which such work is "toibe performed. Infits preferred application :the device will serve as a machine base tforattaching cylinder boring or finishingtools to theengineiblock of?multiple cyl inder engines.

The'complete device comprises the following parts: (a) .a combination of parts so arranged that they :form .an extensible and adjustablearm'which is inserted into one of the-cylinders of the engine block, but not into'the cylinder on which workis-tobe done; (6) an extensibleandadjustable engaging device rotatably attached tothe abovearm and arranged so ?that it'will'engagewthe end of'the cylinder; anextensible-adjusting device mounted near the upper endof the arm; ('0Z)'*a sliding machine base securely clamped to the arm and constructed to give firm support-to the working or finishing'tool without distortion of the cylinder upon which the work is to be performed.

In the accompanying drawings I have illustrated a practical embodiment of this invention, "and the following description thereof will enable others skilled in the art to adapt and use-theinvention; but I do not consider the invention'restricted to the particular form or construction of parts shown in the drawings, as various modifications-and changes may be made by skilled mechanics or-engineers while retaining the essential novel characteristics of the invention. Therefore, I refer to theclaims for summaries of the essentials of the invention and novel" features -of construction and novel combinations ofparts, for-all of- Which protection is desired. a

In the drawings, parts which are Well known are merely conventionally illustrated, Insaid drawings:

Figure 1 is aside elevation of the complete device, some parts being shown in section. Figure 2. is partly another 7 side elevation ofthe eter the left) =and;partly a' section 1 throughthe arm at the right) q .F'gu're 3 "s a plan view of the adjusting device.

Figure tis partly an enlarged-sideelevation of the engaging device (at the right), and ,partly a sectionthrough the said device (atthelef-t). 3

Figure 5 is assembly view (partly sectional) of the sliding machine base. I

Figure 6 is aviewofthe .main member-of the sliding machine base.

Figure 7 is another view of the main member of the sliding machine base, showing an alternative construction. j

The principal partof the machinebase 1, as best shown in Figures 6 and'Z, Sheet "4, can be'such' as to providesuitable meansof mounting the usual portable machine units thereto as provided. in Figures G and 7. With "the desired machine unit mounted on the machine base '1, the method-of attaching the base 1 to any engine cylinder block for which is shown in Figure 4, is internally threaded to receive the externally threaded sleeves 5, the sleeves '5 having notched ends 6 for. ease: of adjustment; sleeves 5 are also projections 9.x. Owing to the coarse thread on the sleeve 5 and the fine thread on the I member 7 the ends 8 can be adjusted tothe The extension,

10 shown OnFigure Q, Sheet 2, cannowlbe movedsothatpins 18, entertheholes 14 in the 1 to be removed from the pins 1"3 which are permanently secured in member 10-;,member is internally threaded to receive ad ustlng members 7 withcylinder engaging ends8and plates 12. The body member 4 of the engagement device isprovided with pairs of holes 15, and the hinge pins 16 in the plates 12 can be inserted into any corresponding pair to form an offset of member 10 in relation to the axial line oii-the cylinder bore. The extension member 10" is internally threaded to receive a screw 17, which is provided with an attachmenthead '18; screw 17 also carries the adjustment 'device,"Fi'gure 3,

Sheet 2, having "a bodybl'ock 21, adjustable to maintain the parts described in position in the cylinder bore as follows. The head 18 is grasped and the hingedmember 4 swinging on the rivets 16 passes through the cylinder bore as indicated by the dotted line 19, Figure 1, Sheet ,1, allowing the cylinder engaging projections 9 to 'engagethe end of a cylinder boreas shown by the full lines." The attachment head 18 is adjusted to project the proper amount above the cylinder block B and ,the'pa'rts in'the adjustment device Figure 3, Sheet 2, are adjusted by -turning the body block 21-on the screw '17 to be below the sur face of thecylinder bore. The knurled wheels25are now turned, causing adjust- Inent screws 24 to move outwardly until tips 26, Wlll'ChfiI' preferably made of fibrous material, come. into engaging contactwith. the cylinder bore, screws 2l being kept from turning by keys 22 which act in keyways 23. The attachment head 18 is thus adjusted to any vertical position above the cylinder 1 block.

The machine base 1 is placedin positionfor the work to be done, the attachment head "18 projecting into the opening formed bythe inwardly projecting edges .27, the pressure member 28 as best shown inFigure5, Sheet 3,

is moved into the opening in base 1,'the lingers 29 coming to-rest on the inner end of edges27, and th'e'outer end 30 of thepressure member28 hanging on the thread of screw 31 supported byits' attached collar 32 on the bridge member 33, the abutments 3(1 ofthe bridge member 33 resting on the outer end of the edges 27fof the basel. The two inwardly projecting edges 36 of. the opening 35in thepressure'member-28 pass under the attachmjent head 18, and by turning the cross ing 35 with its edges 36 in pressure member 28' together-j with the'shiiting action provided.

attachment head18allowingit to b positioned atqdiflerent lpoints in relation to the axial line. ofa cylinderbore, isfthep'prq.

one being worked upon and having projec visional construction to allow base 1 to be positioned properly for, any desired operation; also, no extraprovisions for attaching base l'need be considered and the entire surface38 adjacent to the mounted portable tool mechanism is left free and clear for the mounting of drive motors, centering devices,

controls, etc, at a low and balanced point,

such mounting beingelfected either by means of screw thread 3, Figure 6, or by means of studs 2, Figure 7. Theactual' attaching is accomplished at a point under this surface 38' by the action of the-screw 31 at a point accessible.,..; v 1 r Having thus described my invention, I claim as new, and desire to cover by Letters Patent:- Y

'1. A' deviceit'or securing a tool to' a multi-i cylinder engine block, comprising a; base adapted'to rest' upon the engine block and having amounting for a tool, an anchor securable within a cylinder other than the one being worked upon, a pressure member having pivotal engagement intermediate; its lengthjwith the anchor andhaving two-point engagement at one end with the base adjacent the tool'mounting, abridge straddling the pressure member at itsother end'and restingwith a two-point contact upon the base, and'means to draw the second end of the pressure member towards thebridge to press the 'bridge'and' the opposite endof the pressure member simultaneously against the base. L v .1 2. A device forsecuring a tool to a multi- "cylinder engine block comprising a base adapted to rest upon the engines-block and having amounting for, a tool", amember exe pansible Within a cylinder. other than the tions engageable beneath the'end' of the cylinder wall to resistvan upward pull,-'a'headed anchor adjustably securedto, saidmember so as to project above, thetopoif the; cylinder block," a slotted pressure member having;

ledges fittingunderthe anchor head to form r a pivotal engagement therewith intermediate the length ofthe pressure member, said pressure member having two-point engagement 1 at one end with-the base adjacent thetool member at its other end and resting witha two-point'contact upon the base, and means to draw the second end of the pressure member. towardsrthe bridge to pressthe bridge andthe opposite end ofthe pressure member simultaneously against the base, i

3. A device for securing a tool to ,a multi-j cylinder engine block comprising a base adapted to rest upon the enginefblock' and having 'a mounting for atool, an anchor pro- ,vided with expansible members to engage the walls of'a cylinder othergthan' the one being worked upon, said members' having projec trons engageablebeneath the endof thecylinv J mounting, a bridge straddling the pressure d er Wall to resist an upward pull, a member vertically adjustable upon said anchor, a pressure member having intermediate its length a pivotal engagement with said vertically adjustable member and having at one end engagement With the base adjacent the tool mounting, and clamping means operating upon the second end' of the pressure member to cause its first end to press against the base with the vertically adjustable member serving as a fulcrum.

EWALD A. ARP. 

